Yes, can't see how it can't and SO oil isn't that resistant to cleaning. Way back when I talked to the man himself (when he worked out his bedroom), he told me the oil was vegetable based. I can see Rockoil supply him but I have no idea if it's still veg oil. I mention this because the oil isn't very persistent at hanging around... water is fine, but any detergents and it'll wash out. A solution is just turn the reservoir feed up to max for a 30 mins run out, then back down to your normal.